Relationships of dark septate endophytes with arbuscular mycorrhiza fungi and soil factors under Hedy sarum laeve in arid area
Hedysarum laeve is one of the arid‐active and sand‐fixation plants that can not only conserve soil ,but also block the wind ,reduce soil erosion ,so as to maintain the balance and stability of arid areas .To elucidate the effect of wind and water erosion and the distribution of dark septate endophytes (DSE) ,soil samples (0-50 cm deep) were collected under H .laeve at three different sites (foot‐slope ,mid‐slope ,top‐slope) in Inner Mongolia in June in 2013 . The results showed that the roots of H .laeve could be highly infected by DSE .DSE could form typical symbiotic structures ,such as septate hyphae ,microsclerotia ,vesicle and so on . Soil sampling sites and depth had a significant effect on colonization levels of DSE . DSE hyphae ,vesicle and total colonization showed the following trend across sites :foot‐slope >top‐slope > mid‐slope .The arbuscular mycorrhiza (AM ) fungi colonization was foot‐slope >mid‐slope > top‐slope .DSE colonization had a positive correlation with AM fungal coloniza‐tion ,soil acid phosphatase and alkaline phosphatase .The soil nutrients were different caused by wind and water erosions in different sites .The effect of wind and water erosion of mid‐slope was the strongest .The results suggest that the colonization of DSE could be a better in‐dicator for the changes of soil resources .This research provides basis and references for fur‐ther clarifying the ecological functions of DSE and making full use of DSE to promote vegeta‐tion restoration and soil conservation in arid areas .
NETL
NSTL
万方数据
维普
